hey I don't know if I have a xs400 special or not, and am wondering which carbs are on the stock xs 400 for the year 1981, I can try and post pics but im sure someone out there knows the stock carb, I am trying to order the new diaphrams but need to know the exact model of carb, and aslo any one know the outlet size for were the filter goes ive seen 48mm and 54mm im ordering pod filters but don't want to order wrong size lol, thanks